JPH10258877A - Resealable hermetically-sealed container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resealable, easy-to-unseal hermetically-sealed container, by providing a lid, which is used by being placed directly onto food and continues to an unsealing part and is in contact with a main body container, with an inclined part and by sealing together the flange of the main body container and the flange of the lid. SOLUTION: A main body container 2 and a lid 1, which is used by being placed directly onto food, are hermetically sealed together along a heat-seal area 13, and an unsealing part 11 is provided outside it. By unsealing the unsealing part 11 vertically with the fingers of both hands to unseal the container, it can easily be unsealed with no efforts because it continues to an inclined part 12. A recess rib 8 and the engagement projection rib 9 of the lid 1 fitted together has an unribbed area, therefore the seal can be broken while the projecting rib 9 is prevented from being deformed and its shape is kept. Further, because the engagement projection rib 9 of the lid 1 does not deform also when seal is formed again, therefore they can be fitted together perfectly and the contents can be preserved without causing the lid 1 to be detached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resealable sealed container. More specifically, the present invention relates to a resealable easy-opening sealed container which can be suitably used for packaging of foods and the like having a main body container having a fitting rib portion and having two or more layers and a dropping lid which is heat-sealed.

[0002]

2. Description of the Related Art With the diversification of lifestyles, cooked foods and gas-packaged foods filled in sealed containers have been widely used in ordinary households. However, these foods cannot be eaten at once after being opened, and cannot be used completely, and there is a demand for an easily-openable sealed container that can be resealed and stored in a refrigerator or the like. Conventionally, as an easily openable sealed container obtained by heat-sealing a main body container and a dropping lid, a container as shown in FIGS. The sealed container shown in FIG.
The innermost layer (3) is molded from the innermost layer (4) of the main body container (2) and a multilayer sheet of two or more layers which is a heat-sealable resin layer. By applying pressure under a certain condition using a heat seal hot plate, the flange portion (5) of the drop lid and the flange portion (6) of the main container can be heat-sealed and sealed.
Also, by appropriately selecting the material of the innermost layers (3) and (4) and the heat sealing conditions, it is possible to provide easy-openability in which the heat-sealed flange can be opened by hand. However, the easy-opening sealed container having such a shape has no particular problem with the opening property, but at the time of resealing after opening, the dropping lid only rides on the main container, and the dropping lid slides down, so there is a problem with the resealability. Was.

In the case of the hermetically sealed container shown in FIG. 2, a main body container (2) having two or more layers of flanges having a concave rib portion (8) for fitting and a position fitted to the concave rib portion of the main body container. It is a container which is formed of two or more layers of drop-down lids having a flange portion having a convex rib portion (9) of a fittable shape and which is fitted inside with an opening portion. By applying pressure under a certain condition using a disk, the drop lid (1) and the container body (2) can be sealed and sealed by the flange portion (7). Also, by appropriately selecting the material of the innermost layer and the heat sealing conditions, it is possible to impart openability to the heat-sealed flange portion. However, at the time of opening, the bottom corner portion (10) of the drop lid (1) is caught by the wall portion (16) of the main body container (2), making it difficult to open, and the drop lid (1) is often deformed. In addition, since the convex rib portion (9) for fitting of the drop lid (1) deforms and bends and causes abnormal distortion, resealing after opening is often impossible.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional hermetically sealed container, and has been made as a result of various studies. To provide.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a main container (2) having two or more layers of flanges (7) having concave ribs (8) for fitting, and a concave rib (8) of the main container. An inner fitting container comprising a drop lid (1) with two or more layers of flanges (7) having a fitting rib (9) at a fitting position and having an opening portion (11), Opening section (1
The drop lid (1) in contact with the main container (2) connected to (1) has an inclined portion (12), and the flange portion (2) of the main container and the flange portion (7) of the drop lid (1) are sealed. The present invention relates to a re-sealable easy-open sealed container.

More preferably, the positions of the fitting concave rib portion of the main body container and the fitting convex rib portion of the drop lid are provided at least on opposite sides of the container, and the fitting rib located at a position close to the inclined portion of the drop lid. The convex rib portion has a non-rib portion in the middle portion with respect to the concave rib portion length of the main body container, and the height of the fitting convex rib portion of the drop lid gradually becomes lower and tapered as approaching the opening portion. The seal portion is capable of cohesive peeling or delamination and has a peel strength of 100 to 1
It is a resealable sealed container with easy opening of 500 gr / 15 mm.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A container body (2) and a dropping lid (1) according to the present invention are formed by vacuum forming method, pressure forming method or a combination thereof from two or more layers of sheets. Innermost layer (4) and innermost layer (3) of drop lid (1)
Is sealable, and at least one of them is made of an easy-opening resin or a film layer having an easy-opening function. As such a resin, for example, polypropylene,
Examples thereof include low-density polyethylene, high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, polystyrene, ethylene-methacrylic acid copolymer, and ethylene-methacrylic acid copolymer metal crosslinked product. The innermost layers (3) and (4) can be formed by using only one kind of these resins or a mixed resin of two or more kinds. By heat-sealing the innermost layer (4) of these main containers and the innermost layer (3) of the drop lid, cohesive peeling or delamination is possible, and the peel strength is 100-15.
An easily openable sealed container of 00 gr / 15 mm, preferably 300-800 gr / 15 mm is obtained.

Further, since the outermost layer of the drop lid (1) needs to be able to seal the innermost layers (3) and (4) at the temperature of the hot plate at the time of heat sealing, it has heat resistance that does not adhere to the hot plate. Material selection is required. For example, vinyl chloride, polyester, polypropylene, polycarbonate, nylon and the like can be mentioned. Further, between the outermost layer and the innermost layer of the multilayer sheet used for forming the main body container (2) and the drop lid (1), a saponified ethylene-vinyl acetate copolymer, Vinylidene,
Nylon and the like, and vinylidene chloride, polypropylene, nylon and the like can be appropriately laminated for the purpose of improving the water vapor barrier property.

Further, in order to enhance the fitting effect between the main body container (2) and the dropping lid (1), the dropping lid (1) has a strong rigidity, for example, a resin such as vinyl chloride, polyester, polystyrene, polypropylene or polycarbonate. It is possible to stack the layers. As the multilayer sheet used for forming such a dropping lid (1), a multilayer sheet having a four-layer structure of polyester / ethylene-vinyl acetate copolymer saponified material / polypropylene / polyethylene and polypropylene is used, and for a main container (2). For example, a multilayer sheet having a four-layer structure of polyester / saponified ethylene-vinyl acetate copolymer / nylon / linear low density polyethylene can be used. Further, the thickness of each multilayer sheet varies depending on the shape of the container, the application, etc., but for the drop lid, it is 0.15 to 0.45 mm, preferably 0.20 to 0.25 mm.
35mm is adopted, and 0.20-1.
0 mm, preferably 0.30 to 0.80 mm is employed.

Further, the shape of the fitting concave rib portion (8) of the main body container (2) differs depending on the shape of the container and the shape of the dropping lid (1). The length is effective and at least generally located on opposite sides of the container is effective to enhance the resealing effect, and is located near the center of the drop lid (2) depth. Is effective. Effectively, the width (14) of the concave rib portion (9) is 2.0 to 5.0 mm, preferably 2.0 to 3.0 mm, and the depth (15) is 1.0 to 5.0 mm. Is 1.
0 to 2.0 mm is effective.

The shape of the dropping lid (1) depends on the shape of the dropping lid, but it is preferably at least 5.0 mm in depth in order to obtain an effective resealability, and at the time of opening the bottom corner of the dropping lid. The angle of the inclined portion (12) that contacts the main container connected to the opening portion (11) is 5 degrees or more, preferably 45, so that the portion (10) can be opened without touching the main container wall portion (16).
It is preferable to have it more than degree. In addition, body container (2)
Convex rib portion (9) at a position where it is fitted with the concave rib portion (8)
Preferably, the shape is smaller in length, width and depth by about 0.5 mm than the shape of the concave rib portion (8) of the main container. In particular, in order to enhance the resealing effect, the convex rib portion located at a position close to the inclined portion (12) has a non-rib portion (17) almost in the middle with the concave rib portion (8) of the main container. Is preferred. This is for preventing deformation of the convex rib portion (9), and is effective for resealing at the time of resealing. In addition, in order to perform effective easy opening, the height of the convex rib portion for fitting the drop lid is as shown in FIG.
It is preferred to have a taper (18) that tapers down as it approaches the opening (11).

FIG. 3 to FIG. 5 are explanatory views of a re-sealable easy-open container according to the present invention. The main body container (2) and the dropping lid (1) are sealed by a heat seal part (13), and have an opening part (11) outside. At the time of opening, when opening the opening part (11) up and down with both fingers, it is connected to the inclined part (12), so it is easy to open without resistance,
In addition, since the fitted concave rib portion (8) and the fitting convex rib portion (9) of the drop lid have a non-rib portion (17), the shape is maintained without deforming the convex rib portion (9). It is possible to open it as it is. In addition, since the fitting convex rib portion (9) of the drop lid is not deformed at the time of resealing, it is possible to completely fit the drop lid, and the contents can be stored without the drop lid coming off.

[0013]

Embodiment 1 As shown in FIG. 6, a length of 35 mm and a width of 4 m at three places.
m, an oval main container having a depth of 37 mm, a depth of 100 mm, a width of 130 mm, a flange width of 5 mm and an opening length of 10 mm having a concave concave rib portion for fitting of 3 mm in depth, and a polypropylene / ethylene-vinyl acetate mixture of It was molded from a 0.6 mm multilayer sheet of saponified polymer / linear low density polyethylene to obtain a main body container. In addition, as shown in FIG. 7, a protruding rib portion having a fittable shape near the opening portion has a non-rib portion (17 mm) of 10 mm at the center at a position where the opening portion is fitted with the concave rib portion of the main body container. )
Having two convex rib portions having a length of 12 mm, a width of 3.5 mm, a depth of 2.5 mm, and a depth closer to the opening portion and having a depth of 2.0 mm, and the other two portions being containers 33 mm long, 3.5 mm wide, and depth 2.
5mm, 7mm deep, 45 ° inclined part (12) at the depth connected to the opening part, the top cover (1) whose flange shape, opening part shape and elliptical shape are almost the same as the main body shape The outer layer was formed from a 0.3 mm multilayer sheet made of a mixture of vinyl chloride / nylon / polypropylene and polyethylene. After filling the main container with the wiener sausage, it was heat-sealed while replacing with nitrogen gas. When the opening portion was opened up and down with both hands at the time of opening, the main body container and the drop lid could be opened smoothly. Also, when the remaining sausage was left in the main container and dropped and resealed with the lid, it was fitted smoothly, and even if the main container fell, the dropped lid could be kept without coming off.

[0014]

According to the present invention, an easily openable and resealable sealed container can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conventional sealed container.

FIG. 2 is a sectional view showing another example of a conventional sealed container.

FIG. 3 is a perspective view of a sealed container according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a side view of the drop lid used in FIG. 3;

FIG. 6 is a perspective view of a main container used for a sealed container according to another embodiment of the present invention.

FIG. 7 is a perspective view of a drop lid used in a sealed container according to another embodiment of the present invention.

[Explanation of symbols]

1: drop lid, 2: body container, 3: innermost layer, 4: innermost layer, 5, 6, 7: flange portion, 8: concave rib portion,
9: convex rib, 10: bottom corner, 11: opening, 1
2: Inclined part, 13: Heat seal part, 14: Width of concave rib part, 15: Depth of concave rib part, 16: Wall part, 17: Non-rib part, 18: Tapered part

Claims (5)

[Claims] 1. A main body container having two or more layers of flanges having concave ribs for fitting, and two or more layers having convex ribs of a shape fittable at positions where the concave ribs of the main body container are fitted. It consists of a dropping lid with a flange part, and has an opening part,
In the container fitted on the inside, a resealable portion having an inclined portion on the drop lid in contact with the main container connected to the opening portion, wherein the flange portion of the main container and the flange portion of the drop lid are sealed. Sealed container. 2. The resealable hermetically sealed container according to claim 1, wherein the positions of the fitting concave rib portion of the main body container and the fitting convex rib portion of the drop lid are set at least on opposite sides of the container. 3. The convex rib portion for fitting, which is located at a position near the inclined portion of the dropping lid, has a non-rib portion at an intermediate portion with respect to the length of the concave rib portion of the main body container. Resealable sealed container. 4. The resealable seal according to claim 1, wherein the height of the fitting rib portion of the drop lid is gradually reduced and tapered as the height approaches the opening portion. container. 5. The resealable sealed container according to claim 1, wherein the seal portion is capable of cohesive peeling or delamination and has a peel strength of 100 to 1500 gr / 15 mm and easy opening.